Construction block



FIG. 1 is a front perspective view of a construction block according to one preferred embodiment of the present design;

FIG. 2 is a rear perspective view of the construction block;

FIG. 3 is a top view of the construction block;

FIG. 4 is a bottom view of the construction block;

FIG. 5 is a right side view of the construction block;

FIG. 6 is a left side view of the construction block;

FIG. 7 is a front view of the construction block; and,

FIG. 8 is a rear view of the construction block. 

I claim the ornamental design for a construction block, as shown. 